DCDaniel Chen

Senior Full-Stack Software Engineer · AI Systems Builder

I build full-stack and AI software that works in the real world.

I'm Daniel, a senior engineer with 10+ years of experience building modern web applications, cloud backends, and production AI systems with Python, Node.js, TypeScript, React, FastAPI, Django, and AWS.

Explore my work Start a conversation
10+Years building software
3Product domains
End to endIdea through production
Product engineeringPython & Node.jsReact & TypeScriptLLMs, agents & RAGCloud systemsProduction reliability

01 What I build

Full-stack products with intelligence built in.

I combine frontend craft, backend depth, cloud engineering, and modern AI to deliver useful systems from interface to infrastructure.

01

Full-stack product development

End-to-end web products built with responsive React interfaces, typed application logic, secure APIs, durable data models, and maintainable architecture.

TypeScriptReactNode.jsPython
02

AI application systems

Reliable AI experiences built around real workflows - LLM applications, agents, RAG, multimodal generation, model routing, evaluation, and guardrails.

LLMsAI AgentsRAGFastAPI
03

Cloud backends & integrations

Scalable Python and Node.js services, API integrations, workflow automation, event-driven processing, and AWS infrastructure designed for production.

DjangoAWSPostgreSQLKafka

02 Selected experience

Built across AI, security, and enterprise SaaS.

More than a decade delivering customer-facing products, distributed services, and production AI workflows.

O
OmnekySenior Software Engineer

Multi-model creative orchestration

Architected conversational campaign planning and creative-generation workflows across GPT, Claude, Gemini, Veo, Kling, and Seedance, with routing shaped by quality, cost, and latency.

28%higher first-pass brand-compliant creative acceptance
Generative AIFastAPINext.jsAWS
A
Abnormal AISoftware Engineer II - Full Stack

Grounded threat explanation systems

Built security experiences and LLM workflows grounded in detection signals, threat intelligence, sender behavior, and message context, with validation and deterministic fallbacks.

35%lower Threat Narrative processing latency
CybersecurityDjangoReactKafka
U
Ultimate SoftwareSoftware Engineer

Enterprise workforce platforms

Delivered backend services, reusable interfaces, APIs, and asynchronous integrations for payroll, benefits, employee data, and self-service workflows.

4 yrsbuilding and modernizing business-critical SaaS
Enterprise SaaSNode.jsReactSQL

Experience summaries use public-safe resume details and intentionally omit confidential implementation specifics.

03 About Daniel

Full-stack engineer. AI builder. Partner throughout.

I work across the entire product stack: understanding what users need, shaping the architecture, building React interfaces and Python or Node.js backends, integrating AI workflows, deploying on AWS, and staying close through production.

My background spans generative AI at Omneky, cybersecurity at Abnormal AI, and enterprise SaaS at Ultimate Software.

Discuss an opportunity
Languages

Python, TypeScript, JavaScript, SQL

Frontend

React, Next.js, accessible interfaces, responsive product design

Backend

Node.js, FastAPI, Django, REST, GraphQL, gRPC

AI systems

LLMs, AI agents, RAG, multimodal AI, orchestration, evaluation

Data

PostgreSQL, Redis, Elasticsearch, vector databases

Cloud & delivery

AWS, Docker, Kubernetes, Terraform, GitHub Actions

04 How I work

From unclear idea to working product.

  1. 01

    Discover

    Find the real problem, users, constraints, and measure of success.

  2. 02

    Design

    Shape the smallest valuable product and the architecture behind it.

  3. 03

    Build

    Deliver the interface, backend, AI workflows, integrations, and tests.

  4. 04

    Launch

    Deploy, observe real usage, improve weak points, and document the system.

05 Start a conversation

Let's build something useful.

Have a full-stack product to launch, an AI workflow to productionize, or a senior engineering role that needs broad technical ownership?

hello@danielachen.com Available for select projects and senior software engineering opportunities.